In this lesson, we review all of the major concepts of similar triangles that we have covered thus far: solving proportions, finding scale factor, and solving for missing sides.
We also introduce the three ways that can prove two triangles are similar:
- Side-Side-Side Similarity (SSS~)
- Angle-Angle Similarity (AA~)
- Side-Angle-Side Similarity (SAS~)
Dec. 11 Proving Triangles Similar
We continue our unit on similar triangles with this lesson, which focuses on finding scale factor and using it to find the missing sides of similar triangles. Check out more inside!
Dec. 7 Similar Triangles
Now that we’ve conquered congruent triangles, it’s time to switch things up a bit. Check out this lesson for an introduction to similar figures, with some review of setting up ratios and solving proportions.
Dec. 5 Ratios, Proportions, and Similar Triangles
Get a full recap of congruent triangles in preparation for the Unit 4 Test.
Nov 28 Congruent Triangles Review
Now that we have learned about congruent triangles and how to label congruent parts, we can use that information to prove that two given triangles are congruent. There are 5 ways to prove triangles congruent: SSS, SAS, ASA, AAS, and HL. Check inside the lesson to find out what each acronym means.
Nov. 20-21 Proving Triangles Congruent
If you understand how congruent triangles work, then the next step is to practice labeling those congruent parts. Check out this lesson to find out how to take given information and represent it on a diagram.
Nov. 15-16 Labeling Congruent Parts
Learn about congruent triangles in this lesson on how to write a congruence statement and use congruent statements to compare corresponding parts.
Nov. 13-14 Congruent Triangles
Get a quick review of all of the concepts from G.5 in this lesson:
- Ordering the angles and sides of a triangle
- Determining if three side lengths make a triangle
- Finding the range for the third side of a triangle when given two side lengths
Nov. 11 G.5 Review and Quiz
In our second lesson on triangles, we introduce three more triangle facts:
- The biggest side is always opposite the biggest angle.
- The longest side of a triangle must be less than the other two sides added together.
- When given two side lengths, the range for the third side is between the difference and the sum of the two numbers.
Check out more inside!
Nov. 9-10 Inequalities in Triangles
Welcome to the 2nd Marking Period!!
Beginning this week, we will be starting a new unit on triangles. Click the link below to check out our introductory lesson and learn some basic facts about triangles.
Nov. 8 Intro to Triangles